删除字符串方法详细报告
splice()
原型:array.splice(start[, deleteCount[, item1[, item2[, ...]]]])
下标,删除数量,增加的字符
1 ExamplesSection 2 Remove 0 (zero) elements from index 2, and insert "drum"Section 3 var myFish = ['angel', 'clown', 'mandarin', 'sturgeon']; 4 var removed = myFish.splice(2, 0, 'drum'); 5 6 // myFish is ["angel", "clown", "drum", "mandarin", "sturgeon"] 7 // removed is [], no elements removed 8 Remove 1 element from index 3Section 9 var myFish = ['angel', 'clown', 'drum', 'mandarin', 'sturgeon']; 10 var removed = myFish.splice(3, 1); 11 12 // removed is ["mandarin"] 13 // myFish is ["angel", "clown", "drum", "sturgeon"] 14 Remove 1 element from index 2, and insert "trumpet"Section 15 var myFish = ['angel', 'clown', 'drum', 'sturgeon']; 16 var removed = myFish.splice(2, 1, 'trumpet'); 17 18 // myFish is ["angel", "clown", "trumpet", "sturgeon"] 19 // removed is ["drum"] 20 Remove 2 elements from index 0, and insert "parrot", "anemone" and "blue"Section 21 var myFish = ['angel', 'clown', 'trumpet', 'sturgeon']; 22 var removed = myFish.splice(0, 2, 'parrot', 'anemone', 'blue'); 23 24 // myFish is ["parrot", "anemone", "blue", "trumpet", "sturgeon"] 25 // removed is ["angel", "clown"] 26 Remove 2 elements from index 2Section 27 var myFish = ['parrot', 'anemone', 'blue', 'trumpet', 'sturgeon']; 28 var removed = myFish.splice(myFish.length - 3, 2); 29 30 // myFish is ["parrot", "anemone", "sturgeon"] 31 // removed is ["blue", "trumpet"] 32 Remove 1 element from index -2Section 33 var myFish = ['angel', 'clown', 'mandarin', 'sturgeon']; 34 var removed = myFish.splice(-2, 1); 35 36 // myFish is ["angel", "clown", "sturgeon"] 37 // removed is ["mandarin"] 38 Remove all elements after index 2 (incl.)Section 39 var myFish = ['angel', 'clown', 'mandarin', 'sturgeon']; 40 var removed = myFish.splice(2); 41 42 // myFish is ["angel", "clown"] 43 // removed is ["mandarin", "sturgeon"] 44 Specifications